Samson 3276-D, Mounting And Operating Instructions

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EB 8318 EN 6-1
Operation
6 Operation
The work described in this section is only to
be performed by personnel appropriately
qualified to carry out such tasks.
Risk of personal injury due to exhaust air
being vented.
The actuator is operated with air. As a result,
air is vented during operation.
Î
Wear eye and hearing protection when
working near the actuator.
Crush hazard arising from the moving
actuator stem.
Î
Do not insert hands or finger into the
yoke while the air supply is connected to
the actuator.
Î
Before working on the actuator, discon-
nect and lock the pneumatic air supply
as well as the control signal.
Î
Do not impede the movement of the actu-
ator stem by inserting objects into the
yoke.
Î
Before unblocking the actuator stem after
it has become blocked (e.g. due to seiz-
ing up after remaining in the same posi-
tion for a long time), release any stored
energy in the actuator (e.g. spring com-
pression). See 'Relieving the spring com-
pression in the actuator' in the 'Removal'
section.
Risk of personal injury through incorrect
operation, use or installation as a result of
incorrect information on the actuator.
After any adjustment or conversion work, the
details on the actuator nameplate may no
longer be correct.
Î
Immediately renew any nameplates or
labels with incorrect or outdated infor-
mation.
Î
Add any new values to the nameplate. If
necessary, contact SAMSON to obtain a
new nameplate.
6.1 Throttling service
− The Type 3276 Pneumatic Actuator is de-
signed for a maximum supply pressure
of 80 psi (5.5 bar) when used for throt-
tling service.
− During normal operation, the handwheel
in actuator versions with a top-mounted
or side-mounted handwheel must be
placed in the neutral position to allow the
actuator to move through its entire travel
range in throttling or on/off service.
6.2 Manual mode (versions
with top-mounted or side-
mounted handwheel only)
In the manual mode, the valve is opened
and closed by the handwheel. The valve po-
sition is independent of the signal pressure
or actuator spring.
WARNING ! WARNING !
WARNING ! WARNING !
WARNING !